National Semiconductor | High-performance Analog

 

 LM431   
Adjustable Precision Zener Shunt Regulator 		Click link to Download

Features

  • Average temperature coefficient 50 ppm/°C
  • Temperature compensated for operation over the full temperature range
  • Programmable output voltage
  • Fast turn-on response
  • Low output noise

    • Description

    The LM431 is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5V (VREF) up to 36V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications.

    Also Recommended
    LM4120Lower Supply Current, Lower Temperature Coefficient & Enable Pin
    LM4125Lower Supply Current, Lower Temperature Coefficient
    LM4128Lower Supply Current, Lower Temperature Coefficient & Enable Pin
    LM4132Lower Supply Current, Lower Temperature Coefficient & Enable Pin
    LMV431▲Low Voltage (1.24V)



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM431 LMV431
    Initial Accuracy (+/-) Max1 % 1.5 %
    Reference VoltageAdjustable Adjustable
    Tempco, max (ppm/C)54 ppm 129, 138 ppm
    Operating Current1 mA 0.055 mA
    Output Current100 mA Undefined mA
    Reference with respect toAnode (low side) Anode (low side)
    Temperature Min-40 deg C -40, 0 deg C
    Temperature Max85 deg C 70, 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM431 Adjustable Precision Zener Shunt Regulator319
    Kbytes    		2-Sep-10日本語  


    Other Technical Documents
    TitleTypeDate
    Powering The Signal Path: Using an integrated flyback IC along with post filtering will deliver a high-performance split-rail supplyExternal Article 2009-02-26

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM431ACM/NOPB

    LM431ACM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide181
    AVNET-EMWorldwide1995
    BRITESTONESouth Korea59
    DIGI-KEYWorldwide802
    FARNELLEurope and Asia464
    MOUSERWorldwide1930
    NEWARKAmericas476
    RS COMPONENTSWorldwide60
    TAYLORAmericas1916
    		$0.20 each at 1K+ pcsrail
    of
    95
    LM431ACM3/NOPB

    LM431ACM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AITGAsia Pacific361
    ARROWWorldwide5955
    AVNET-EMWorldwide9000
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia6395
    MOUSERWorldwide2715
    NEWARKAmericas728
    TAYLORAmericas8924
    		$0.20 each at 1K+ pcsreel
    of
    1000
    LM431ACM3X/NOPB

    LM431ACM3X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide15448
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide7001
    MOUSERWorldwide2490
    TAYLORAmericas15448
    TECHMOSAAsia Pacific60000
    		$0.20 each at 1K+ pcsreel
    of
    3000
    LM431ACMX/NOPB

    LM431ACMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide2500
    MOUSERWorldwide2500
    TAYLORAmericas2500
    TECHMOSAAsia Pacific5000
    		$0.20 each at 1K+ pcsreel
    of
    2500
    LM431ACZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide3486
    AVNET-EMWorldwide2987
    BRITESTONESouth Korea29749
    DIGI-KEYWorldwide350
    MOUSERWorldwide2697
    RSL MICROAsia Pacific5400
    TAYLORAmericas3486
    		$0.20 each at 1K+ pcsbox
    of
    1800
    LM431AIM/NOPB

    LM431AIM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide19085
    DIGI-KEYWorldwide0
    MOUSERWorldwide2171
    RS COMPONENTSWorldwide30
    		$0.18 each at 1K+ pcsrail
    of
    95
    LM431AIM3/NOPB

    LM431AIM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide710
    DIGI-KEYWorldwide6531
    FARNELLEurope and Asia5136
    MOUSERWorldwide2570
    NEWARKAmericas2378
    TAYLORAmericas26133
    		$0.18 each at 1K+ pcsreel
    of
    1000
    LM431AIM3X/NOPB

    LM431AIM3X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific220
    ARROWWorldwide6000
    AVNET-EMWorldwide9000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2940
    TAYLORAmericas6000
    		$0.18 each at 1K+ pcsreel
    of
    3000
    LM431AIMX/NOPB

    LM431AIMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2330
    		$0.18 each at 1K+ pcsreel
    of
    2500
    LM431AIZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide4509
    AVNET-EMWorldwide988
    DIGI-KEYWorldwide1634
    FARNELLEurope and Asia1378
    MOUSERWorldwide3339
    NEWARKAmericas3219
    RSL MICROAsia Pacific3600
    TAYLORAmericas4509
    		$0.18 each at 1K+ pcsbox
    of
    1800
    LM431BCM/NOPB

    LM431BCM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1001
    AVNET-EMWorldwide1273
    DIGI-KEYWorldwide1091
    MOUSERWorldwide1900
    TAYLORAmericas1001
    		$0.20 each at 1K+ pcsrail
    of
    95
    LM431BCM3/NOPB

    LM431BCM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2294
    AVNET-EMWorldwide6000
    DIGI-KEYWorldwide4975
    FARNELLEurope and Asia6195
    MOUSERWorldwide1920
    NEWARKAmericas366
    TAYLORAmericas2294
    		$0.20 each at 1K+ pcsreel
    of
    1000
    LM431BCM3X/NOPB


    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1001
    ARROWWorldwide3000
    AVNET-EMWorldwide12000
    DIGI-KEYWorldwide0
    MOUSERWorldwide3000
    RSL MICROAsia Pacific15000
    TAYLORAmericas3000
    		$0.20 each at 1K+ pcsreel
    of
    3000
    LM431BCMX/NOPB

    LM431BCMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    		$0.20 each at 1K+ pcsreel
    of
    2500
    LM431BCZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide3578
    AVNET-EMWorldwide3764
    DIGI-KEYWorldwide856
    MOUSERWorldwide3600
    TAYLORAmericas3578
    		$0.20 each at 1K+ pcsbox
    of
    1800
    LM431BIM/NOPB

    LM431BIM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1468
    AVNET-EMWorldwide995
    DIGI-KEYWorldwide3661
    MOUSERWorldwide1995
    TAYLORAmericas5698
    		$0.19 each at 1K+ pcsrail
    of
    95
    LM431BIM3/NOPB

    LM431BIM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1520
    AVNET-EMWorldwide4300
    CEACAsia Pacific2000
    DIGI-KEYWorldwide798
    FARNELLEurope and Asia7205
    MOUSERWorldwide2840
    NEWARKAmericas191
    RS COMPONENTSWorldwide810
    TAYLORAmericas2940
    		$0.19 each at 1K+ pcsreel
    of
    1000
    LM431BIM3X/NOPB

    LM431BIM3X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide35422
    AVNET-EMWorldwide9000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2895
    RSL MICROAsia Pacific60000
    TAYLORAmericas35422
    TECHMOSAAsia Pacific15000
    		$0.19 each at 1K+ pcsreel
    of
    3000
    LM431BIMX/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    TAYLORAmericas2500
    		$0.22 each at 1K+ pcsreel
    of
    2500
    LM431CCM/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.31 each at 1K+ pcsrail
    of
    95
    LM431CCM3/NOPB

    LM431CCM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide7000
    AVNET-EMWorldwide2263
    DIGI-KEYWorldwide11194
    FARNELLEurope and Asia429
    MOUSERWorldwide2000
    NEWARKAmericas355
    TAYLORAmericas7000
    		$0.27 each at 1K+ pcsreel
    of
    1000
    LM431CCM3X/NOPB

    LM431CCM3X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AECO TECHAsia Pacific1000
    AVNET-EMWorldwide9000
    DIGI-KEYWorldwide0
    MOUSERWorldwide2950
    		$0.27 each at 1K+ pcsreel
    of
    3000
    LM431CCZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 12 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    TAYLORAmericas684
    		$0.31 each at 1K+ pcsbox
    of
    1800
    LM431CIM/NOPB

    LM431CIM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide880
    AVNET-EMWorldwide1605
    DIGI-KEYWorldwide20430
    MOUSERWorldwide1089
    TAYLORAmericas880
    		$0.30 each at 1K+ pcsrail
    of
    95
    LM431CIM3/NOPB

    LM431CIM3

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide3000
    AVNET-EMWorldwide4000
    DIGI-KEYWorldwide4522
    FARNELLEurope and Asia1405
    MOUSERWorldwide1085
    NEWARKAmericas420
    TAYLORAmericas11978
    TECHMOSAAsia Pacific3000
    		$0.30 each at 1K+ pcsreel
    of
    1000
    LM431CIM3X/NOPB

    LM431CIM3X

    RoHS Status

    SOT-23    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide3000
    DIGI-KEYWorldwide0
    MOUSERWorldwide1975
    RSL MICROAsia Pacific3000
    		$0.30 each at 1K+ pcsreel
    of
    3000
    LM431CIZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1800
    MOUSERWorldwide1775
    		$0.30 each at 1K+ pcsbox
    of
    1800

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM431AC MDC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM431AIBP
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AIBPX
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AITP
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AITPX
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431BIMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431BIZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCM
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CIMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431J-MLS
    		NONE
    		NONE
    		07 Jun 2001

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM431.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM431 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM431ACM/NOPB

    LM431ACM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM431
    ACM
    LM431ACM3/NOPB

    LM431ACM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1F
    XTT
    LM431ACM3X/NOPB

    LM431ACM3X
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1F
    XTT
    LM431ACMX/NOPB

    LM431ACMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM431
    ACM
    LM431ACZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM431
    ACZ
    LM431AIM/NOPB

    LM431AIM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM431
    AIM
    LM431AIM3/NOPB

    LM431AIM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1E
    XTT
    LM431AIM3X/NOPB

    LM431AIM3X
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1E
    XTT
    LM431AIMX/NOPB

    LM431AIMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM431
    AIM
    LM431AIZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM431
    AIZ
    LM431BCM/NOPB

    LM431BCM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    431
    BCM
    LM431BCM3/NOPB

    LM431BCM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1D
    XTT
    LM431BCM3X/NOPB

    		10.34
    10.399
    		SOT-2331260DetailDownloadN/A
    		N1D
    XTT
    LM431BCMX/NOPB

    LM431BCMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    431
    BCM
    LM431BCZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM431
    BCZ
    LM431BIM/NOPB

    LM431BIM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    431
    BIM
    LM431BIM3/NOPB

    LM431BIM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1C
    XTT
    LM431BIM3X/NOPB

    LM431BIM3X
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1C
    XTT
    LM431BIMX/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailDownloadN/A
    		NSZXTT
    431
    BIM
    LM431CCM/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailDownloadN/A
    		NSZXTT
    431
    CCM
    LM431CCM3/NOPB

    LM431CCM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1B
    XTT
    LM431CCM3X/NOPB

    LM431CCM3X
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1B
    XTT
    LM431CCZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM431
    CCZ
    LM431CIM/NOPB

    LM431CIM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    431
    CIM
    LM431CIM3/NOPB

    LM431CIM3
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1A
    XTT
    LM431CIM3X/NOPB

    LM431CIM3X
    		10.34
    10.399
    		SOT-2331
    1    		260
    260    		DetailDownloadN/A
    		N1A
    XTT
    LM431CIZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM431
    CIZ

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM431.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM431 is located at RoHS Status.

    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM431ACMSLM04404600353250011002356520
    LM431ACM3SLM04404600353250011002356520
    LM431ACM3XSLM04404600353250011002356520
    LM431ACMXSLM04404600353250011002356520
    LM431ACZSLM04404600353250011002356520
    LM431AIMSLM04404600353250011002356520
    LM431AIM3SLM04404600353250011002356520
    LM431AIM3XSLM04404600353250011002356520
    LM431AIMXSLM04404600353250011002356520
    LM431AIZSLM04404600353250011002356520
    LM431BCMSLM04404600353250011002356520
    LM431BCM3SLM04404600353250011002356520
    LM431BCM3XSLM04404600353250011002356520
    LM431BCMXSLM04404600353250011002356520
    LM431BCZSLM04404600353250011002356520
    LM431BIMSLM04404600353250011002356520
    LM431BIM3SLM04404600353250011002356520
    LM431BIM3XSLM04404600353250011002356520
    LM431BIMXSLM04404600353250011002356520
    LM431CCMSLM04404600353250011002356520
    LM431CCM3SLM04404600353250011002356520
    LM431CCM3XSLM04404600353250011002356520
    LM431CCZSLM04404600353250011002356520
    LM431CIMSLM04404600353250011002356520
    LM431CIM3SLM04404600353250011002356520
    LM431CIM3XSLM04404600353250011002356520
    LM431CIZSLM04404600353250011002356520

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM431.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM431 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM431AC MDC
    		NONE
    		NATIONAL SEMICONDUCTOR
    		03 Dec 2008
    LM431AIBP
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AIBPX
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AITP
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431AITPX
    		LM431AIM
    		NATIONAL SEMICONDUCTOR
    		05 Mar 2008
    LM431BIMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431BIZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCM
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CCZ
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431CIMX
    		NONE
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009
    LM431J-MLS
    		NONE
    		NONE
    		07 Jun 2001

    LM5045/LM5046 Full-Bridge PWM Controllers with Integrated MOSFET Gate Drivers Overview
    Loading video...


    LM5045/LM5046 Full-Bridge PWM Controllers with Integrated MOSFET Gate Drivers Overview
    Date: 2011-03-23
    Length: 00:05:15
    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation